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Broan
Downdraft Ventilation System

Model # 634 Official Broan venting system

Here are the diagrams and repair parts for Official Broan 634 venting system, as well as links to manuals and error code tables, if available.

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Installation guide

Model diagram and schematic

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Showing 10 of 11 parts  |
Seal Strip 99500322
#6

Venting assy diagram

Seal strip

Part #99500322

Replaced by #S99500322

?
Manufacturer substitution
This part replaces 99500322. Substitute parts can look different from the original.
This item is not returnable
$4.18
In Stock
Damper Rod 98005576
#7

Venting assy diagram

Damper rod

Part #98005576

Replaced by #S98005576

?
Manufacturer substitution
This part replaces 98005576. Substitute parts can look different from the original.
This item is not returnable
$3.37
In Stock
Bird Scrn 98005577
#3

Venting assy diagram

Bird scrn

Part #98005577

Replaced by #S98005577

?
Manufacturer substitution
This part replaces 98005577. Substitute parts can look different from the original.
This item is not returnable
$3.38
In Stock
Damper Flap 98005581
#2

Venting assy diagram

Damper flap

Part #98005581

Replaced by #S98005581

?
Manufacturer substitution
This part replaces 98005581. Substitute parts can look different from the original.
This item is not returnable
$3.46
In Stock
Plate Damper 98005584
#8

Venting assy diagram

Plate damper

Part #98005584

Replaced by #S98005584

?
Manufacturer substitution
This part replaces 98005584. Substitute parts can look different from the original.
$7.67
In Stock
Seal Strip 99500321
#5

Venting assy diagram

Seal strip

Part #99500321

Replaced by #S99500321

?
Manufacturer substitution
This part replaces 99500321. Substitute parts can look different from the original.
This item is not returnable
$4.18
In Stock
Screw, Silver 99150576
#4A

Venting assy diagram

Screw, silver

Part #99150576

The manufacturer no longer makes this part, and there's no substitute part

Housing, Alum. 97006250
#1A

Venting assy diagram

Housing, alum.

Part #97006250

The manufacturer no longer makes this part, and there's no substitute part

Range Hood Outlet Box Cover Screw 99170245
#4

Venting assy diagram

Range hood outlet box cover screw

Part #99170245

The manufacturer no longer makes this part, and there's no substitute part

Damper Plate, Alum. 98005598
#8A

Venting assy diagram

Damper plate, alum.

Part #98005598

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your downdraft ventilation systems

Choose a symptom to see related downdraft vent repairs.

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Why won't my downdraft vent rise up?

Main causes: lack of electrical power, up/down activation switch failure, bad vent gear motor…

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Why won't my downdraft vent lower down?

Main causes: electrical power failure, up/down activation switch problems, vent gear motor failure…

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Why does the downdraft vent raise and lower continuously?

Main causes: problems with the vent limit switches, up/down activation switch failure…

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Why won't the fan on my downdraft vent blow air?

Main causes: fan control switch failure, bad blower fan motor, broken blower wheel, wiring failure…

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Why doesn't the downdraft vent fan pull much air?

Main causes: clogged grease filters, air duct problems, fan motor failure, broken blower wheel…

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Most common repair guides to help fix your downdraft ventilation systems

These step-by-step repair guides will help you safely fix what’s broken on your downdraft vent.

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How to replace a downdraft vent up/down switch

How to replace a downdraft vent up/down switch

The up/down switch starts the gear motor to raise and lower the air vent. Replace the up/down switch if defective.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent blower motor

How to replace a downdraft vent blower motor

The blower motor spins the fan blade that removes smoke and steam from the cooktop area. Replace the blower motor if it …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a downdraft vent gear motor

How to replace a downdraft vent gear motor

The gear motor raises and lowers the air vent when you push the activating switch. Replace the gear motor if defective.…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your downdraft ventilation systems

Use the advice and tips in these articles to get the most out of your downdraft vent.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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How to repair broken or damaged wires video

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…

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